Producing chlorin derivatives of the amyl series.



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GERMANY, ASSIGNOR T0 BADISCHE ANILIN 8:; SODA FABRIK, 0FLUDWIGSHAFEN-UN-THE-RHINE,

GERMANY, A CORPORATION.

PRUDUCING CHLORIN DERIVATIVES OFTHE AMYL SERIES.

Patented June 2, 1914.

mnga ag, Specification 01 Letters Patent. No Drawing, Application filedFebruary 27, 1913. Serial No. 751,104.

To all whom it may concern it known that I, FRANZ VVEBEL, citizen of theGerman Empire, residing at Mannheim, Germany, have invented new anduseful Improvements in Producing Chlorin Derivatives of the Amyl Series,of which the following is a specification.

When chlorin is allowed to react .on trimethyl-ethylene, the chiefproducts formed are chlor-amylenes, but during the reaction some of thehydrochloric acid which is set unaltered trimethylethylene and tertiaryisoamyl chlorid is formed. A. mixture thus obtained, containingchlor-amylenes and isoamyl chlorid is unsuitable for the production ofisoprene by treatment with an agent capable of splitting ofihydrochloric acid, because an isoprene is obtained which contains a.considerable amount of trimethyl-ethylene.

l have found that the formation of tertiary isoamyl chlorid can beavoided when reacting with chlorin on t-rimethyl-ethylene, if thereaction be caused to take place under considerably diminished pressure.

.The following example will serve to illustrate further the nature of myinvention, which, however, is not confined to this example. Allowchlorin and vaporized trimethyl-ethylene (in the proportion, by volume,of about two of chlorin in three of the vapor) to pass through a leadcoil cooled by ice, while maintaining a. pressure of about 50millimeters of mercury. Aportion of the reaction product separates outin the coil and can be collected in a suitable cooled vessel, while theremaining vapors are passed through milk of lime in order to absorb thehydrochloric acid, and are then condensed by means of atoluene-carbon-dioxid freezing mixture. The two condensed portions aremixed together and freed from any unaltered trimethyl-ethylene,whereupon a product is obtained consisting of trimcthylethylene chloridand mouochlor a-mylenes. As each of these bodies can be made to giverise to isoprene, the mixture can be employed for this purpose Withoutany further purification being necessary.

Now What I claim is The process of producing chlorin derivatives of thea-myl series by reacting with chlorin on trimethyl-ethylene underconsiderably diminished pressure.

in testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

FRANZ WEBEL. Witnesses:

J. Anne. LLOYD, JosErH HEIFFER.

